// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_EVENT_MONITOR_H_
#define UI_VIEWS_EVENT_MONITOR_H_

#include "base/memory/scoped_ptr.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/views/views_export.h"

namespace ui {
class EventHandler;
}

namespace views {

// RAII-style class that forwards events to |event_handler| before they are
// dispatched.
class VIEWS_EXPORT EventMonitor {
public:
    virtual ~EventMonitor() { }

    // Create an instance for monitoring application events.
    // Events will be forwarded to |event_handler| before they are dispatched to
    // the application.
    static scoped_ptr<EventMonitor> CreateApplicationMonitor(
        ui::EventHandler* event_handler);

    // Create an instance for monitoring events on a specific window.
    // Events will be forwarded to |event_handler| before they are dispatched to
    // |target_window|.
    // The EventMonitor instance must be destroyed before |target_window|.
    static scoped_ptr<EventMonitor> CreateWindowMonitor(
        ui::EventHandler* event_handler,
        gfx::NativeWindow target_window);

    // Returns the last mouse location seen in a mouse event in screen
    // coordinates.
    static gfx::Point GetLastMouseLocation();
};

} // namespace views

#endif // UI_VIEWS_EVENT_MONITOR_H_
